All about the name Jack

Jack is a...

The meaning of the name Jack is Diminutive Form Of John Or Jackson. The origin of the name Jack is English. This is the culture in which the name originated, or in the case of a word, the language.

Originally a nickname for the given name John. When short for Jackson, the name Jack it means Son of Jack. Nicknames of the name Jack include Jay and J.J., but it is mostly considered a nickname in itself. Jac and Jak are alternate
spellings of the name Jack.

Famous Jacks tend to actually have the first name John, such as President Jack (John Fitzgerald) Kennedy. Jack Nicholson is a famous actor, not to be confused with Jack Niklaus, the golfer. Jack Benny was a famous comedian and Jack Black is both a comedian and actor. Jack Dempsey was a famous boxer.
Jack Kevorkian was a famous doctor who fought for the right to commit suicide.

Jack Ruby killed Lee Harvey Oswald, after the latter assassinated Jack Kennedy. The most infamous Jack is likely Jack the Ripper, who murdered several women in the year 1888.

Fictional Jacks include Jack Bauer from the television show, 24, Jack Harkness from Torchwood, Jack Tripper, played by John Ritter, from the TV show, Three’s Company.